Overview

Database versions

Self-hosted

Database	Version
PostgreSQL	9.6+
MySQL	5.6+
MariaDB	10.0+
SQL Server	2017+
SQLite	All
MongoDB	4.2+
CockroachDB	21.2.4+

Managed/Serverless

Database	Notes
Neon	Serverless Postgres
Supabase	Postgres
PlanetScale	MySQL
Turso	libSQL (SQLite)
Cloudflare D1 (Preview)	SQLite
AWS Aurora	MySQL/Postgres
MongoDB Atlas	MongoDB

Feature matrix

Constraints

Feature	PostgreSQL	MySQL	SQLite	SQL Server	MongoDB
PRIMARY KEY	✔️	✔️	✔️	✔️	✔️
FOREIGN KEY	✔️	✔️	✔️	✔️	—
UNIQUE	✔️	✔️	✔️	✔️*	✔️
NOT NULL	✔️	✔️	✔️	✔️	✔️
DEFAULT	✔️	✔️	✔️	✔️	✔️

*SQL Server has limitations with UNIQUE constraints

Data types

Feature	PostgreSQL	MySQL	SQLite	SQL Server	MongoDB
Arrays	✔️	—	—	—	✔️
JSON	✔️	✔️	✔️	✔️	✔️
Enums	✔️	✔️	✔️	—	✔️

Database guides

• PostgreSQL — Self-hosted, Neon, Supabase, and CockroachDB
• MySQL/MariaDB — Self-hosted and PlanetScale
• SQLite — Local, Turso, and Cloudflare D1
• SQL Server
• MongoDB

Driver adapters

For custom database drivers, see Driver adapters.